@CHARSET "UTF-8";
body {
  font-family: Helvetica, Arial, sans-serif;
  font-size: 0.9em;
}

#caidan{float:left;width:100px;height:600px;border:1px solid red;}
#neirong{float:left;}
#menu{float:left;margin-top:90px;}


p {
  line-height: 1.5em;
}

ul#menu, ul#menu ul {
  list-style-type:none;
  margin: 0;
  padding: 0;
  width: 15em;
}

ul#menu a {
  display: block;
  text-decoration: none; 
}

ul#menu li {
  margin-top: 1px;
}

ul#menu li a {
  background: #333;
  color: #fff; 
  padding: 0.5em;
}

ul#menu li a:hover {
  background: #000;
}

ul#menu li ul li a {
  background: #ccc;
  color: #000;
  padding-left: 20px;
}

ul#menu li ul li a:hover {
  background: #aaa;
  border-left: 5px #000 solid;
  padding-left: 15px;
}
.code {
 border: 1px solid #ccc;
 list-style-type: decimal-leading-zero;
 padding: 5px;
 margin: 0;
}
.code code {
 display: block;
 padding: 3px;
 margin-bottom: 0;
}
.code li {
 background: #ddd;
 border: 1px solid #ccc;
 margin: 0 0 2px 2.2em;
}
.indent1 {
 padding-left: 1em;
}
.indent2 {
 padding-left: 2em;
}
